A search of the archive and datasheets was not helpful. Is there a non-obvious trap when using the ICD2 to program (not debug) a 10F PIC? My circuit is VERY simple- two AA batteries feeding the circuit (no regulation), a NO switch from one pin to Vss, and an LED on the one pin which is not involved in ICSP. Did I neglect something here? The chip seems to program once, then not again. I can't get it to erase or blank check, even. Mike H. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist